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Globigerinoides sacculifer Brady 1877 from: Kennett, J.Srinivasan, M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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Species Globigerinoides sacculifer Brady 1877


Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test low trochospiral, chambers spherical except the final one, which is elongate, sack like; three and a half to four in the final whorl, increasing slowly in size as added. The last chamber may be rather small, or it may be elongate and lobulate. Sutures on both sides slightly curved and depressed;surface with regular subhexagonal pore pits; umbilicus narrow, primary aperture interiomarginal, umbilical, a distinct arch bordered by a rim; prominent supplementary apertures on spiral side.
Discussion / Comments:
Kennett & Srinivasan (1983):
This species is distinguished from Gs. immaturus and Gs. quadrilobatus by its elongate sacklike final chamber and/or by its very lobulate, elongate last chamber. Gs. suleki Bermudez (1961) is considered to be a variant of Gs. sacculifer.
Chaisson & Leckie (1993):
Remarks: Early forms of Globigerinoides sacculifer differ from G. triloba in being less cancellate and in having a more lobate test. However, lower and middle Miocene specimens of both taxa are gradational, making differentiation highly subjective. In this study, a broader species concept is applied to G. sacculifer. Specimens possessing the "saclike" final chamber first appear in Core 130-806B-36H-5 (upper Miocene) and thereafter become increasing abundant. After its initial occurrence, the saclike final chamber becomes generally larger and increasingly irregular in shape, culminating in G. fistulosus in the mid-Pliocene. Throughout its range, G. sacculifer is gradational with G. triloba, G. quadrilobatus, and G. immaturus in most samples. Therefore, most of these morphological forms are included under the G. sacculifer species concept in this study. Similar species: Dissolved specimens of Sphaeroidinella dehiscens and Sphaeroidinellopsis seminulina can resemble this species if their cortex has been removed (or if it has not yet developed, as in the case of juvenile specimens).
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globigerinaceae
       Superfamilia Nonionacea
        Familia Globigerinidae
         Genus Globigerinoides
          Species Globigerinoides sacculifer

32
 Ordo Foraminiferida
  Familia Globigerinidae
   Genus Globigerinoides
    Species Globigerinoides sacculifer
Synonym list:
Kennett & Srinivasan (1983):
1877 Globigerina sacculifera Brady. - Brady : p.535
Chaisson & d'Hondt (2000):
1877 Globigerina sacculifera Brady. - Brady : p.164 pl 9 figs 7-10
1983 Globigerinoides sacculifer Brady. - Kennett & Srinivasan : p.66 pl 14, figs 4-6
Chaisson & Pearson (1997):
1877 Globigerina sacculifera Brady. - Brady : p. 164 pl. 9, figs. 7-10
Van Eijden & Smit (1991):
1877 Globigerina sacculifera Brady. - Brady : p.604 pl. 80, figs. 11-17; pl. 81, fig. 2; pl. 82, fig.4
1991 Globigerinoides sacculifer Brady. - Van Eijden & Smit : p.111
Chaisson & Leckie (1993):
1877 Globigerina sacculifera Brady. - Brady : p.164 pl. 9; fig. 7-10
1983 Globigerinoides sacculifer Brady. - Kennett & Srinivasan : p.66 pl. 14; fig. 4-6
1993 Globigerinoides sacculifer Brady. - Chaisson & Leckie : p.170 pl. 2; fig. 16
References:

Brady,H.B. (1877):
Supplementary note on the foraminifers of the Chalk (?)of the New Britain Group . Geological Magazine London Vol. 4

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123

Chaisson,W.P. and Leckie,R.M. (1993):
High-Resolution Planktonic Foraminifer Biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 130 Eds: Berger, W.H.Kroenke, L.W..Mayer, L.A..et al. p. 137-178

Chaisson,W.P. and Pearson,P.N. (1997):
Planktonic foraminifer biostratigraphy at Site 925: middle Miocene–Pleistocene.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 154 Eds: Shackleton, N.J.Curry, W.B.Richter, C.Bralower, T.J.

Chaisson,W.P. and d'Hondt,S.L. (2000):
Neogene planktonic foraminifer biostratigraphy at Site 999, Western Caribbean Sea.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 165 Eds: Leckie, R.M.Sigurdsson, H.Acton, G.D.Draper, G. p. 19-56
Anonymous: Unedited TaxonConcept data
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